Ornamental sheet metal and manufacture of same



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June 1 1926. 1,586,927

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OENMETAL SHEET METAL AND MANUEACTURE 0E SAME Filed August 24, l1925 #zz/m. MM

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' may UNITED STATES nur wmmson, or snUs'roxE, am: Braun GREEN, or covEN'raY, ENGLAND.

onNaMEN'rAL sHEE'r METAL 'AND iunuracrunn or SAME.

` Application nled August 24, 1925,-Serat No. 52,140, and. in Great Britain September 13, 1921.

Our invention comprises improvements in sheet metal and vin the manufacture of same and has for its object to produce sheet metal of an improved and ornamental appearance capable of being used forv the manufacture of a variety of ornamental articles.

According to this invention, the ornamental sheet Vmetal is manufactured byforming a composite ingot or slab fron two or more ingots, sheets or slabs of different:

metal or alloy which are secured face to face, one or more of said ingots, sheets or slabs being shaped or cut to expose the surface of the metal or alloy beneath; and by subsequently rolling the composite ingot 'or slab until the desired cross section or thickness is obtained.

Referring to the drawings Figure 1 is an elevation showing ltwo ingots when separated.

Figure 2 is a similar view showingthe two ingots securedto form `a composite ingot. a Figure 3 is an elevationV shownga part of the rolling.

Figure 4 is a similar -view to Figure` 3 showing the result of a machining operation.

Figure 5 isa plan view of lFigure 4'. Figure 6 is an elevation showing the edge' fof the sheet metal formed after a iinalrolling.

Figure 7 isa sectional. view drawn to a larger scale illustrating the sheetmetal illustrated in Figure 6. v

Figure 8 is a plan of a composite ingot formed from five layers of diierent' metal or alloy. i

Figure 9 is a section on line 9 9 of Figure8. Figures 1 to 7 of the drawings illustrate the steps in the manufacture of ornamental sheet metal having a surface composed of strips of two different metals occurring alternatively, for example, copper and brass. AItis to be understood that this is merely a simple example of a large number of differatterns or ornamental surfaces that produced by means of this invention. 'In Figure 1, an upper ingot of brass is represented at 1() which is shown placed above a lower ingot fof copper represented at 11. The brass ingot l10 is shown approximately one third of the thickness of the copper inot 11 as an example of the way in which .t e relative thiclmesses--o the diierent ingots `may be gauged-in av proportion incomposite ingot after a preliminary only extended A longitu versely of their relative hardness, in orderto i suv has become equal to a standard width'which it is desired that thelinally produced sheet metal will have. Figure' 3 shows a part of the ingot after this'transverse rolling oper-..

ation, T hel face of this ingot is then subjected to a machining operation so as to remove partsof the brass ingot or layer 10 f to leave'a series of strips Alseparated by a series of spaces 16 of approximately equal width.` This machiningoperation may be conveniently carried out by means of a series -of milling cutters secured the `desired distance apart on a transverse spindle which is rotated continuously and gradually moved along the face of the work. Itv will be seen from the drawings that the machining is. u

done in a longitudinal direction, that is, 'in a direction at right angles tot the machining operation, the brass 10 is cut completely through, and the surface of the copper 11 is also slightlycut to removethe.

direction of the 'preliminary rolling ope ation.` In

series of rolling processes, in v'a longitudinal direction, that-is, in a direction parallel to 4the 'strips 15. By this means the brass strips 154 become embedded in the softer co per matrix 11, and sheet metal 'having a ush smooth surface composed of alternate strips of brass and copper. is produced. elevation or view of the edge of thismetal is shown in Figure 6, itbeing understood that clearness. A still larger view of the final sheet metal is shown'fin Figure 7; From the thickness is exaggerated-for Athe Sake of this figure-'it will be seen-that the boundary between 4the copper surface yand the brass surface is regular and clearly denedQfyIt is fund in 'practice that when the composite. .ingot shown in Figures 4 and 5'is IOllBd in a direction longitudinally of the strips n15, the. strips 15 do not expand laterally, but

they., preserve their ori nal width and are inally and become embedded in the copper ingot or layer below, and thus sheet metal having a width e ual to the length of the composite ingot after its preliminary rolling is produced.

The rolling operations may be carried out in several stages as found convenient, and the metal may be annealed one cr more times A as the rolling progresses. For example, the composite ingot .may be annealed after the preliminary rolling and before its surface 1s subjected to the machining operation. i

igures 8 and 9 of the drawings illustrate, by way of example, a composite ingot formed from a plurality of ingots or layers of different metals or alloys so as to produce sheet metal having a more elaborate surface. l The example shows an ingot formed from five layers of metal or alloy in which squares are cut out of the four upper layers, the squares becoming progressively smaller with the lower strata of metals. In this way a pattern is Vproduced having a com- Y paratively large number of different colours on its surface.

From the foregoing it will be readily appreciated that by means of this invention, We have invented a new method of manufacturing sheet metal, enabling a large variety of fancy or ornamental surface patterns to be produced. Although simple patterns or designs have beenshown in the drawings, it is to be understood that more elaborate designs or (patterns may be employed if de- Sired, an that curved lines and pictorial representations may be resorted to. 'Ihe invention is particularly applicable to working with brass and copper, and the final 'sheet metal produced may be spun o'r otherf Wise workedin the usual way. lThe metal can be used for making such articles as finer plates for doors, hearth furniture and ower pots with very pleasing results. The metal can also be formed into tubes which can be bent and .used for constructions such as bedsteads.v

yWhat we claim then is 1. The process of manufacturing sheet metal involving the preparation of a composite slab formed by securing face toA face layers of different appearance, removing arts ofthe' surface of the composite slab 1n order to expose the metal of different appearance below said surface, and subseuently rolling the composite slab, whereby s eet metal having an ornamental lsurface is produced.

2. The process of manufacturing sheet metal involving the preparation of a composite slab formed by securing face to face layers of different appearance, rolling the composite slab previously -to the removal of parts of its surface, removing parts o'f the surface of the composite slab in order to expose the metal of di'erent appearance below said surface and subsequently rolling the composite sla 3. The process of manufacturing sheet metal involving the vpreparation of a composite slab formed bysec-uring face to face layers of different appearance, subjecting the composite slab to a reliminary rolling, annealing the composite slab, removing parts of the surface of the composite slab in order to expose the metal of different appearance below said surface and subsequenty rolling the slab to sheet form.

4. The process of manufacturing sheet metal involving the securing of layers of different metal face to face by fusion with .an intermediate metallic joiningv substance to form a composite slab, subjecting the composite slab to a preliminary rolling, an-

nealing the composite slab, removing partsl of the surface of thecomposite slab in order to expose the metal of different appearance below said surface, said removal being effected by a machining operation with the use of milling cutters, and subsequently rolling the composite slab to produce sheet metal of uniform thickness and having an` ornamental surface.

5. The process of manufacturing sheet metal involving vthe formation of a composite ingot by securing ingots of different metal face to face by fusion with an intermediate joining substance, subjecting the composite ingot to apreliminary rolling until its length becomes equal to a standard width, annealing the rolled ingot, machining the surface of the annealed ingot with milling cutters in a direction transversely of the direction of the preliminary rollin to expose strips of the different metal be ow said surface, and rolling the machined ingot in a direction transversely of the direction of the preliminary rolling to produce ornamental sheet metal of the standard width and uniform thickness.

In witness whereof we affix our signatures.

WILLLAM WILKINsoN. ARTHUR GREEN.

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